Stop motion for double cylinder jacquard looms



Oct. 24, 19 K. v. MGCALEB STOP MOTION FOR DOUBLE CYLINDER JACQUARD LOOMSFiled. March 2, 1944 FM 7 I 1 Patented Oct. 24, 1944 STOP MOTION FORDOUBLE CYLINDER JACQUARD LOOMS Kenneth V. McCaleb, Elberton, Ga.,assignor to United Merchants & Manufacturers, Inc., Wilmington, Del., acorporation of Delaware Application March 2, 1944, Serial No. 524,732

Claims. (Cl. 139-338) In the operation of double cylinder Jacquard loomsit is of the utmost importance that the socalled odd and even cards ofthe two pattern card series follow one another in correct sequence, thatis, that they alternate one odd, one even, one odd, and so on;otherwise, of course, a defective pattern results. And even when thework is under close observation by a skilled weaver it is more or lessdifficult, depending, for example, upon the pattern being woven todetect promptly when the cards are alternating out of time. On occasionthe error is not even discovered until the completed fabric is laterinspected and in any event considerable stretches of fabric are thusfrequently woven imperfectly with consequent loss.

The object of the present invention is to provide relatively simple andeffective means for automatically stopping the loom with reasonablepromptness when the cards are alternating any predetermined number ofsteps out of time, and this is accomplished, in general, by providingtwo independently operable members adapted to effeet the stopping of theloom when simultaneously active and by controlling the operation of suchmembers, one by the odd card series and the other by the even cardseries, in such manner that the two members are simultaneously renderedactive when the cards are alternating out of time.

For purposes of illustration the invention is shown more or lessdiagrammatically, Fig. 1 of the drawing showing so much of a double liftdouble cylinder Jacquard as is necessary to an understanding of theinvention and Fig. 2 showing the control mechanism in perspective on amuch enlarged scale.

In Fig. 1 the reference characters I and 2 desnate respectively the oddand even cylinders over which pass the odd cards 3 and the even cards 4.

As usual, the odd cards control a bank of needles 5 and the even cards abank of needles 6, the needles in turn controlling the two series ofhooks I and 8, respectively. The two grifis are marked 9 and I0, and thecomber board is generally designated by the reference I I.

As is well understood, the pattern cards are variously perforated, andwhen applied to the needles the perforations telescope over the needlesaligned with such perforations and leave the corresponding hooks inposition to be raised by their griff bars; while the imperforate areasengage the needles aligned with such areas, thrust the needleslongitudinally, and thereby flex the 55 corresponding hooks laterally toclear their griff bars.

In the embodiment of the" invention illustrated, -a circuit [2 isprovided which, when energized, operates to stop'the loom through anyappropriate relay mechanism l3 or otherwise; and in series in thiscircuit are arranged two independently operable switches. As shown, theswitches are mounted on a suitable support l4 secured, as by bracket 15,to the underside of the comber board. The circuit leads are brought totwo spring contact members l6, ll which are insulated from one another,and the switch elements comprise two long contact bars [8, l9 guided inbrackets and 2|. The contact bars are bridged by a spring contact 22 andare biased, as by springs 23, to their lower or open circuit position,as illustrated. When both contact bars are raised they wipe across theirrespective contacts IS, IT and circuit I2 is closed and the loom broughtto rest.

The switch bars are arranged to be controlled by the Jacquard mechanism;and, to that end, the eye 24 in the-top of bar 18 is tied by a line 25to any available hook 26 of the even card series and the eye 21 in thetop of bar I9 is tied by line 28 to a hook 29 of the odd card series,the hooks 26 and 29, and their respective control needles 30 and 3|being in turn controlled by registering perforations in certain cards ofthe two series.

According to the present invention, certain of the cards of the oddseries are perforated or cut in alignment with needle 3|, and when eachsuch perforation telescopes over that needle, the raising of the griifbars 9 will serve to raise switch bar I9 and engage it with contact I1.Similarly, certain cards of the even card series are perforated or cutin alignment with needle 30, so-that when each such perforationtelescopes over that needle the raising of grifi" bars Ill will serve toraise switch bar I 8 and engage it with contact l6. It is understood, ofcourse, that the griffs. operate alternately, griff 9 rising aftercylinder I has come in and then falling coincidently with the rising ofgriff l0 after cylinder 2 has come in.

It will be noted that the contact bars start to wipe over theirrespective contacts l6, ll at the beginning of their upward movement andcontinue so to do throughout the remainder of their stroke. In otherwords, their actions overlap, so that when one bar is, say, half way upon its upward stroke and the other half way down on its downward stroke,the circuit will be closed. It will be understood, therefore, thatwhenever one of the odd cards perforated as above mentioned is followedin sequence by an even card likewise perforated, the two switches willboth be closed (due to their overlapping action) and the loom brought torest.

Accordingly, such of the cards are perforated that when the two seriesare alternating in time, i. e. in proper sequence, at least oneunperforated card of one series always follows a perforated card of theother series, with the result that the two contact bar are not both intheir circuit closing positions at the same time and the loom continuesto run. Conversely, such of thecards are perforated that when the twoseries are not alternating in true sequence, a perforated card of oneseries is followed by a perforated card of the other series, with theresult that the two contact bars are in their circuit closing positionsat the same time and the loom is stopped.

Within these principles many cutting or perforating combinations of thecards will be seen to be possible and for purposes of illustration only,a particular combination suitable for stop ping the loom with reasonablepromptness when either set of cards is one, two or three steps out oftime will be briefly described.

For example, the perforations in the odd numbered cards (controllingneedle 3|, hook 29 and bar l9) may be cut in card Nos. 1, 9, 17, 25,etc.; and the perforations in the even numbered cards (controllingneedle 30, hook 26 and bar 18) may be cut in cards Nos. 4, 6, 12, 14,20, 22, etc. This should be three steps out of time, the cards will comeinto action as follows:

l83105 1g7 ligetc.

A before, the loom is automatically. stopped, in this instance by thesimultaneous closure of the switches by perforated cards 12 and i Thereis thus provided a fully automatic stop motion operative to stop theloom whenever the cards of either series are out of time bypredetermined numbers of steps (one, two or three in the illustrativeexample) with the result that particular cutting repeats after everyfour cards in each set or every eight cards in the combined sets; and ifthe full set is not exactly divisible by eight, the maximum possiblenumber of repeats is cut and the remainder of the cards are left uncut.The following will illustrate the operation of the loom with the cardsso perforated.

When the cards are alternating in correct sequence, they will come intoaction as follows:

I235789101112etd The underscored numerals represent perforated cards,and it will be observed that a perforated card of one series is alwaysfollowed by an unperforated card of the other series. In the result, asstated above, only one of the contact bars is in its circuit closingposition at one time and accordingly the loom continues to run.

If now, for example, the odd card series should be one step out of time,card 5, say, will come up instead of card 3 and the two series will comeinto action as follows:

It will be. seen now that after a very few picks two of the perforatedcards-follow one another, viz. i and 9, which means that bars [8 and 19are both in engagement with their contacts at the same time; whereupon,as above explained, the loom is stopped.

If, again, the odd card series should be two, or three, steps out oftime, the cards, will come into action as follows:

Two steps out 5 2 '7 4 Q etc. Three steps out '7 2 2 2 11 etc.

Again, in both instances, two perforated cards of and 2} follow oneanother, and, as before, the loom is brought to rest.

Similarly with the even cards, of which'but one illustration need begiven. If this series weaving of any appreciable length of imperfectcloth is avoided and without reliance upon the weavers observation ofthe defect. As will be apparent, of course, the loom cannot be run,after the stop motion has functioned, until the cards have been restoredto their proper relative positions.

The following is claimed:

1. In a double lift double cylinder Jacquard loom including alternatelyacting odd and even pattern cards, the combination of a circuit adaptedto be energized to stop the loom, two switches arranged in series insaid circuit and biased to open position, a hook subject to control bycertain cards of the odd card series and a hook subject to control bycertain cards of the even card series, and connections from said hooksto the switches to close the same in response to the lifting of saidhooks, certain of the cards of each series having needle perforationstherein to con trol the lifting of the respective hooks, saidperforations being formed in such of the cards that when the cards arealternating in true sequence at least one unperforated card of oneseries follows each perforated card of the other series and that whenthe cards are alternating one, two or three steps out of time aperforated card of one series is followed by a perforated card of theother series.

2. In a double lift double cylinder Jacquard loom including alternatelyacting-odd and even pattern cards, the combination of a circuit adaptedto be energized to stop the loom, two normally open switches arranged inseries in said circuit, a hook subject to control by certain cards ofthe odd card series and a hook subject to control by certain cards ofthe even card series, and means for closing said switches in response tothe lifting of said hooks, certain of the cards of each series havingneedle perforations therein to control the lifting of the respectivehooks, said perforations being formed in such of the cards that when thecards are alternating in true sequence at least one unperforated card ofone series follows each perforated card of the other series and thatwhen the cards are alternating a predetermined number of steps out oftime a perforated card of one series is followed by a perforated card ofthe other series.

3. In a double lift double'cylinder Jacquard loom including alternatelyacting odd and even pattern cards, the combination of a circuit adaptedto be energized to stop the loom, two normally open switches arranged inseries in said circuit, a hook subject to control by certain cards ofthe odd card series and a hook subject to control by certain cards ofthe even card series, and means for closing said switches in response tomovement of said hooks, certain of the cards of both series havingneedle perforations therein to control the movement of said hooks, saidperforations being formed in such of the cards that when the cards arealternating in true sequence at least one unperforated card of oneseries follows each perforated. card of the other series.

4. In a double lift double cylinder Jacquard loom including alternatelyacting odd and even pattern cards, the combination of two independentlyoperable control members adapted to effect the stopping of the loom whensimultaneously active, a hook subject to control by certain cards of theodd card series and a hook subject to control by certain cards of theeven card series, and means for rendering said members active inresponse to movement of said hooks, certain of the cards of each serieshaving needle perforations thereinto control the movement of therespective hooks, said perforations being formed in such of the cardsthat when the cards are alternating in true sequence at least oneunperforated card of one series follows each perforated card of theother series.

5. In a double cylinder Jacquard loom including alternately acting oddand even pattern cards, the combinationof two independently operablemembers adapted to effect the, stopping of the loom when simultaneouslyactive, one of said members being controlled by one series of cards andthe other member by the other series of cards and means for renderingsaid members active simultaneously when the cards are alternating out oftime.

KENNETH V. McCALEB.

Patent No. 2,561,1L

CERTIFICATE OF CORRECTION.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 2,first column, line 68, for 5 2 7 b. 9" read 5 2 7 L. 2; and that thesaid Letters Patent should be read with this correction therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealed this 2nd day of January, A. D. I 1915.

Leslie Frazer (Seal) Acting Comrrlissioner of Patents,

